Attention is currently required from: fixeria. neels has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/28048 )

Change subject: msc: add test for OS#5532: crash from CM Serv Rej ......................................................................

Patch Set 1:

(1 comment)

File msc/MSC_Tests.ttcn:

https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/28048/comment/d8b05660_58617... PS1, Line 6815: BSSAP.send(ts_PDU_DTAP_MO(ts_CM_SERV_REQ(CM_TYPE_MO_SMS, mi)));

I am trying to understand the TC scenario. […]

the scenario is: a conn is already open (e.g. an earlier CM Service is ongoing). Then rx a second CM Service, but its mobile identity is wrong. Is the comment above not clear enough?

The first IMSI is xxxx00094, the wrong one is xxxx99999. Could also be a TMSI, but code wise it's easier to create an IMSI that is always guaranteed to mismatch.

The LU is just a necessary prelude to allow the first valid CM Service Request to begin.